oj.uz

Submission #1040956

# Submission time Handle Problem Language Result Execution time Memory
1040956 2024-08-01T12:47:22 Z c2zi6 Sorting (IOI15_sorting) C++14
20 / 100
 1000 ms 600 KB 
#define _USE_MATH_DEFINES
#include <bits/stdc++.h>
#define ff first
#define ss second
#define pb push_back
#define all(a) (a).begin(), (a).end()
#define replr(i, a, b) for (int i = int(a); i <= int(b); ++i)
#define reprl(i, a, b) for (int i = int(a); i >= int(b); --i)
#define rep(i, n) for (int i = 0; i < int(n); ++i)
#define mkp(a, b) make_pair(a, b)
using namespace std;
typedef long long ll;
typedef long double ld;
typedef pair<int, int> PII;
typedef vector<int> VI;
typedef vector<PII> VPI;
typedef vector<VI> VVI;
typedef vector<VVI> VVVI;
typedef vector<VPI> VVPI;
typedef pair<ll, ll> PLL;
typedef vector<ll> VL;
typedef vector<PLL> VPL;
typedef vector<VL> VVL;
typedef vector<VVL> VVVL;
typedef vector<VPL> VVPL;
template<class T> T setmax(T& a, T b) {if (a < b) return a = b; return a;}
template<class T> T setmin(T& a, T b) {if (a < b) return a; return a = b;}
#include <ext/pb_ds/assoc_container.hpp>
using namespace __gnu_pbds;
template<typename T>
using indset = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
#include "sorting.h"

#define ANSWER {\
        rep(i, ans.size()) {\
            P[i] = ans[i].ff;\
            Q[i] = ans[i].ss;\
        }\
        return ans.size();\
    }

VI bit;
void add(int i, int s) {
    while (i < bit.size()) bit[i] += s, i += i&-i;
}
int get(int i) {
    int ret = 0;
    while (i > 0) ret += bit[i], i -= i&-i;
    return ret;
}
ll inversions(VI a) {
    int n = a.size();
    ll ret = 0;
    bit = VI(n+1);
    rep(i, n) {
        ret += i - get(a[i]+1);
        add(a[i]+1, +1);
    }
    return ret;
}
VI operator*(VI a, PII s) {
    swap(a[s.ff], a[s.ss]);
    return a;
}

int findSwapPairs(int N, int S[], int M, int X[], int Y[], int P[], int Q[]) {
    VPI ans;
    int n = N;
    int m = M;
    VI a(n);
    rep(i, n) a[i] = S[i];
    VPI op(m);
    rep(i, M) op[i] = mkp(X[i], Y[i]);
    int step = 0;
    while (inversions(a)) {
        PII best;
        ll bestinv = 1e18;
        rep(u, n) rep(v, n) {
            ll curinv = inversions(a * op[step] * mkp(u, v));
            if (curinv < bestinv) {
                best = mkp(u, v);
                bestinv = curinv;
            }
        }
        ans.pb(best);
        a = a * op[step] * best;
        step++;
    }
    ANSWER
    return 0;
    /*bool sub3 = false;*/
    /*if (X[0] == 0 && Y[0] == 1) sub3 = true;*/
    /*if (issorted()) ANSWER;*/
    /*int ptr = 0;*/
    /*UPDATE(X[ptr], Y[ptr])*/
    /*ptr++;*/
    /*if (sub3) {*/
    /*    if (ind[0] > 1) {*/
    /*        if (ind[1] == 0) MYSTEP(ind[0], 1)*/
    /*        else MYSTEP(ind[0], 0)*/
    /*    }*/
    /*    if (ind[1] > 1) {*/
    /*        if (ind[0] == 1) MYSTEP(ind[1], 0)*/
    /*        else MYSTEP(ind[1], 1)*/
    /*    }*/
    /*    replr(i, 2, n-1) {*/
    /*        MYSTEP(ind[i], i)*/
    /*    }*/
    /*    MYSTEP(0, 0);*/
    /*} else {*/
    /*    rep(i, n) {*/
    /*        MYSTEP(ind[i], i)*/
    /*    }*/
    /*}*/
    /*ANSWER;*/
}

Compilation message

sorting.cpp: In function 'void add(int, int)':
sorting.cpp:44:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   44 |     while (i < bit.size()) bit[i] += s, i += i&-i;
      |            ~~^~~~~~~~~~~~
sorting.cpp: In function 'll inversions(VI)':
sorting.cpp:52:19: warning: conversion from 'std::vector<int>::size_type' {aka 'long unsigned int'} to 'int' may change value [-Wconversion]
   52 |     int n = a.size();
      |             ~~~~~~^~
sorting.cpp: In function 'int findSwapPairs(int, int*, int, int*, int*, int*, int*)':
sorting.cpp:39:24: warning: conversion from 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} to 'int' may change value [-Wconversion]
   39 |         return ans.size();\
      |                ~~~~~~~~^~
sorting.cpp:89:5: note: in expansion of macro 'ANSWER'
   89 |     ANSWER
      |     ^~~~~~

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 436 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 344 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 436 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 344 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 732 ms 480 KB Output is correct
11 Correct 830 ms 348 KB Output is correct
12 Correct 724 ms 480 KB Output is correct

Subtask #3
0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Execution timed out 1091 ms 348 KB Time limit exceeded
4 Halted 0 ms 0 KB -

Subtask #4
0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 436 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 344 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 732 ms 480 KB Output is correct
11 Correct 830 ms 348 KB Output is correct
12 Correct 724 ms 480 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 344 KB Output is correct
15 Execution timed out 1091 ms 348 KB Time limit exceeded
16 Halted 0 ms 0 KB -

Subtask #5
0 / 20.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1028 ms 600 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #6
0 / 26.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1028 ms 600 KB Time limit exceeded
2 Halted 0 ms 0 KB -